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US 4,072,016 AGranted
Method of reconstructing and reclamation of river channels
AssigneeNone recorded
InventorsKiyoshi Seki, Ichiro Tomioka, Yoshihiko Sawa
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AssigneeNone recorded
InventorsKiyoshi Seki, Ichiro Tomioka, Yoshihiko Sawa
Estimating the term…
A method of reconstructing or reclaiming river channels which are partially filled with soft, slimy sedimentary deposits including industrial wastes which are in a semi-fluid condition or fluidized state comprising the steps of: demarcating a portion of the channel by placing a water tight wall entirely across the channel from bank to bank at an upstream and downstream location; depositing stable fill material adjacent the banks of the channel so as to displace the soft sedimentary deposits and water toward the center of the channel; and treating the displaced soft sedimentary deposit in situ beneath the overlying water so as to stabilize the entire mass. The channel may be completely reclaimed by pumping out the overlying water after the soft sedimentary deposit has been stabilized and then filling with stable material or stable material may be simply placed on the stabilized mass and the water displaced over the top of the downstream wall or over the adjacent bank.
A method of improving river, harbor or other waterway channels having large deposits of soft sediment in a fluidized state therein, by contouring and stablizing the channel, comprising the steps of:
Dependencies are inferred from the claim text.
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No related US applications are recorded in the indexed filing history.
Engineering works in connection with control or use of streams, rivers, coasts
For making embankments; for back-filling: for back-filling
Protecting water resources: river restoration
Hydraulic engineering
Term ended 7 Feb 1995 (estimated)
USPTO file history isn’t available for this patent, so only indexed dates are shown.
1. Field of the Invention
This invention relates to a method of displacing, consolidating and stablizing soft sedimentary deposits including industrial wastes in a fluidized state in watercourses or harbors for the purpose of improving the watercourse or completely reclaiming the area by stablizing the sedimentary deposit and filling the area. The area may then be used for most any purpose to which dryland may be used, for example, as parks, golf courses or other type greenzones or for erecting buildings or other structures.
2. Description of the Prior Art
The accompanying drawings illustrate the use of the method of the present invention in improving and reclaiming a river.
FIG. 1 is a plan view of a demarcated portion of a river using the method of the present invention.
FIG. 2 is a vertical sectional view taken laterally of the river shown in FIG. 1 showing the stage of the process after the walls have been placed across the river.
The method of the present invention consists of the following steps which are set forth in chronological order.
First, as shown in FIGS. 1 and 2, a closed compartment or chamber designated area (A) is formed in the river, watercourse or harbor by placing partition walls 1, such as sheet piles across the river at an upstream and a downstream location.
Second, suitable fill material b is deposited along the boundry of Area (A) (in the illustration, only along both banks of the river). The fill material may be sand or soil which will build up a surface of sufficent bearing strength to support heavy machines which can travel thereon. The backfilling of the stable material is deposited in successive vertical and lateral layers so that the soft sediment material (C) which is in a fluidized state is gradually displaced by the heaver solid material and forced to move toward the center of the river.